• The capital market line (CML) represents portfolios that optimally combine risk and return.

  • CML is a special case of the capital allocation line (CAL), where the risk portfolio is the market portfolio. Thus, the slope of the CML is the Sharpe ratio of the market portfolio.
  • The intersection point of the CML and the efficient frontier will result in the most efficient portfolio, called the tangent portfolio.
  • As a generalization, buy assets if the Sharpe ratio is above the CML and sell if the Sharpe ratio is below the CML.